Spring winding and assembling machine



July 27, 1937. e. F.=.RO BARGE SPRING WINDING AND ASSEMBLING MACH1I&E

2 Sheets-Shee t 1 Filed June 20, 1956 July 27, 1937. RQBARGE 2,088,094

SPRING WINDING AND ASSEMBLING MACHINE Filed June 20, 1956 2 Sheets-Sheet 2 p INVENT OR L7 re jaw Patented July 27, 1937 mans-i PATENT creme o SPRING WINDING AND AS SEMIBLING MACHINE.

George F. Robarge, Toledo, Ohio Application June 20, 1936, Serial No. 86,262 2 Claims. (01. 29-87(1) This application relates to a spring winding and assembling machine.

The machine of this application operates to wind the end. of a flat coil spring around the center of the same to tension it and to push such end behind a holding lug projecting from a plate having a slotted shaft which receives the inner end of the spring and around which the spring is tensioned.

For an understanding of the machine herein disclosed reference should be had to the accompanying drawings. In these drawings,

Fig. 1 is a. pictorial View of the machine with parts cut away for purposes of clarity;

Fig. 2 is a view as if taken in the direction of the arrow 2 of Fig. 3;

Fig. 3 is an elevation of the machine shown in Fig. 1;

Fig. 4 is a fragmentary plan View;

Fig. 5 is a fragmentary end View;

Fig; 6 is a cut-away end view with the parts shown in a position different from that of Fig. 5;

Fig. 7 is another end View with the parts in still another position.

Referring to these drawings, it will be seen that these show a plate l0 having a slotted shaft ll receiving the inner end of a. fiat coil spring l2, whose outer end I4 is to be positioned behind 2. lug l5 projecting from the plate it, and the machine of the application operates to move the end Id of the spring from its original position which is remote from the lug l5 towards and over and behind the lug l5, thereby hooking the end of the spring under the lug l5 to hold the spring end in place and to tension the spring around the slotted shaft 1 I.

The machine itself comprises a base 20 having a clamping element 2| which operates to clamp the plate Ill in place on the base 20 and. against an abutment block 22.

On a pedestal 23 positioned at and secured to the back of the base 20 is a plate 24 substantially parallel to the base and provided with a lug 25 at its forward edge. On the plate 24 is a block 26 journalling a rotary shaft 28 whose upper end is provided with a crank handle 29 and whose lower end is provided with a crank 3| having a downwardly projecting hook 32.

The upper surface of the block 26 is formed of the contour illustrated to provide a cam portion 33 which raises the handle 29 and with it the shaft 28, the crank 3! and the hook 32 as the handle 29 rides over it, a portion 34 which maintains these parts so raised as the handle 29 rides over it, and a portion 35 which permits these parts to drop when the handle 29 rides over it. The operation of the machine is as follows:

A plate ill having a slotted shaft H projecting upwardly therefrom is positioned on the base of 5 the machine and is clamped in place. Thereupon flat coil spring [2 is disposed on the plate I!) with its inner end received in the slotted end of the shaft II and with its outer end It a substantial distance away from the lug [5 of the plate It. The handle 29 is then rotated in the direction of the winding of the spring l2 until its crank 3| reaches cam lug 25 whereupon hook 32 is lowered to the level of the spring end I4; further rotation of the handle will cause 15 hook 32 to engage the end I l oi the spring, and due to the positioning of the parts this will be just prior to the engagement of the handle 29 with the lifting cam 33. Continued rotation of the handle will cause it to engage the lifting 20 cam 33 whereupon the hook 32 is raised to raise the end M of the spring and further rotation of the handle along the cam portion 34 tensions the spring while maintaining the end Hi so raised, and during this time hook 32 and spring end l4 rotate beyond plate lug l5.

When the handle reaches the cam portion 35, the handle drops and the lower end of spring l4 drops with it and down to the level of lug it; reverse rotation of the handle then permits the 30 spring end l4 to back up and engage and hook under lug l5, and be free of hook 32.

After hook 32 is free of the spring end M, and the latter is hooked under lug [5, the clamp handle 2| is moved to permit removal of the plate I0 and another spring l2 may be inserted and clamped for having the spring tensioning operation performed thereon.

I claim:

1. A machine for tensioning a fiat coiled spring and positioning the free end thereof into interlocking engagement with a hooked lug projecting from a plate having means for anchoring the inner end of the spring comprising a base, means on the base for clamping a plate in position thereon, a rotary means comprising a shaft having a crank on one end thereof and a handle on the other, means fixed to the base for journalling the shaft with its axis perpendicular to the base and with its crank end nearer the base than is its handle end, but with its crank end spaced from the base, the crank having on its free end a hook, and stationary cam means fixed to the base and positioned to be engaged by parts of the rotary means as the latter rotates for moving the rotary means bodily towards or away from the base as it rotates so as to move the hook on the crank of the shaft and with it the free end of the spring towards or away from the base as such free end of the spring is moved around the anchored inner end of the spring.

2. A machine for tensioning a fiat coiled spring and positioning the free end thereof into interlocking engagement with a hooked lug projecting from a plate having means for anchoring the inner end of the spring comprising a base, means on the base for clamping a plate in position thereon, a rotary means comprising a shaft having a crank on one end thereof and a handle on the other, means fixed to the base for journalling the shaft with its axis perpendicular to the base and with its crank end nearer the base than is its handle end, but with its crank end spaced from the base, the crank having on its free end 20 a hook, and stationary cam means fixed to the base and positioned to be engaged by parts of the rotary means as the latter rotates for moving the rotary means bodily towards or away from the base as it rotates so as to move the hook on the crank of the shaft and with it the free end of the spring towards or away from the base as such free end of the spring is moved around the anchored inner end of the spring, the cam means being so oriented with respect to the means for clamping the plate on the base that when a plate is properly positioned on the base and clamped. thereon the cam means will move the rotary means away from the base when the hook approaches the plate lug and will hold the rotary means away from the base until after the hook has passed the lug and will move the rotary means towards the base after the hook has passed the lug.

GEORGE F. ROBARGE. 

